'Big Brother' Star Mark Jansen Surprisingly Was Not Always Ripped

He’s come a long way. It looks like Big Brother star Mark Jansen wasn’t always as ripped as he is today! Though you probably know him as a personal trainer, after surprising pics of Mark pre-fame surfaced on reddit, you’ll see just how far he’s really come.

While Mark didn’t undergo a transformation on the CBS reality show, once you see his before-and-after snaps, you’ll have a grasp on just how much of a lifestyle change he went through! Watch the video below to see what he used to look like.

Mark has opened up about his weight loss journey on the show. "I played football for a year at University Buffalo and I graduated. I was a big boy," he’s said. "I weighed about 330-340 and then I knew I had to get in shape."

Though he’s a tough guy in the gym, he’s a self-proclaimed teddy bear, too! "I'm a big teddy bear," he added. "I usually tell them, 'Don't tell anyone I said that' because I like the whole tough guy persona but as soon as I smile, it's hard to hide."